Improvement in doob-speings



attent @time ."IABEZ R'MASON, or NEWARK, Newt-"JERSEY, AND JOB JOHNSON, OF BROOKLYN, NEW YORK.

Later@ Param: No. 63,914, dated April 16, 1867.

Y. IMPROVEMENT IN DOOR-SPRINGS.

'ro AL-vw-I'oii ITMAY OONOERN:

Be it known that we, JABEZHFJHASON, of Newark, in the county oilEssex, and State of NewJersey, and JOB JOHNSON, of Brooklyn, in the county of Kings, and State of New York, have invented, made, and applied to use irnrmrininv new and usfnl Improyggnrent poor-Springs 3` and we do hereby declare the following tovbe a full,V clear,

and exact description of the said invention, reference being had to the annexed drawing, making part 'of this specification, wherein Figure l is an elevation of said spring with our improvement applied thereto.

Figure 2 is a plan, and

Figure 3 a side view'oi` bracket separately.

Figure 4 isa plan, and

Figure 5 aside view of the sliding cylinder.

Similar marks of' reference denote like parts.n

The nature of our said invention consists in a reversible toothed bracket' receiving a cylindrical ratchet that receives the end of'V the spring, and can be slid endwise thereon'to connect or disconnect the ratchet from the toothed bracket. By this construction the toothed bracket can be applied at'the'top or the bottom of the spring,and pass cither'to the right or to the left, both sides being alike, and the cylindrical ratchet can be applied to the spring and slidden endwise to connect with the teeth of the bracket and-keep the door shut, Or keep it open, or not operate at all, according to the position of the ratchet cylinder in relation to the toothed bracket.

In the drawing, `a represents a portion of a door, b part of the casing, c the hinges of any ordinary char acter. d is the torsion wire spring, made either straight orwound in any portion of its length into a helix to increase its elasticity. e is a bracket, receiving one end ofthe spring and holding it permanently inany usual manner. f is a guide-eye to the spring near the middle. g is our improved bracket, formed with a cylindrical portion, 1, into which passes the cylinder h that sets upon theprismatic end of the spring cl. The prismatic portion at the end of the spring d is to be suliciently long to, allow the cylinder h to be slidden endwise onlit. The said spring may be squared, but We prefer that it be formed as a triangular prism. 2 are the teeth on the bracket g, formed at both ends of the cylindrical portion 1, and 3, 3 are the arms or ratchets on the cylinder h. It', now, the cylinder 7L is raised so that the arms or ratchets 3 do not touch the teeth 2 the door-spring will be inoperative; if the cylinder is slidden endwise when the door is shut.,'and the spring d at the same time slightly twisted, the door will be closed after being opened, but if the teeth 2 and 8 are engaged when the door is open the action of the spring cl will be to open instead of shut the door. The bracket g may have teeth of anydesired size or shape, and said teeth, being on both sides, the bracket can be applied in any position. The cylindrical part of the ratchet h is formed with a screw-thread, receiving a nut, as at 4, iig. 6, so that the teeth can be held firmly together when the spring is operative. By forming the prismatic end o f the spring triangular We are enabled to get `a more reliable connection with the cylinder h, because the .width of each side of the prism is greater than the diameter of the Wire. y

What we claim, and desire to secure by Letters Patent, ist 1. The bracket g formed with teeth, in combination with the cylindrical ratchet h and spring d, sulstan tially as and for the purposes set forth.

`2. We claim the nut 4, in combination with the cylinderh, spring d, and bracke't g, substantially as and` for lthe purposes set forth.

In witness whereof we have hereunto set our signatures this second day of October, '1866.

JABEZ F. MASON, JOB JOHNSON.

Witnesses:

Oms. H. SMITH, GEO. D. WALKEB. 

